Pattern Index Explained: Fades, Case Hardened and More

What the Pattern Index Is

Alongside float, every skin stores a pattern index, also called the paint seed, a whole number from 0 to 999. It acts like a seed that tells the game how to place and rotate the finish on the model. For plain or uniform finishes the seed makes no visible difference, so one copy looks like any other.

For a smaller set of finishes the seed matters a great deal. On these skins the position of a color, a crack or a texture shifts with the index, so certain seeds produce rare and sought-after looks. Because the number is fixed at creation, collectors treat specific indexes as named tiers and pay premiums for them. Knowing whether a finish is pattern-sensitive is the first step before you chase a particular seed, since most skins are not.

Case Hardened and Blue Gems

The classic example is the Case Hardened family, whose electroplated look varies wildly by seed. Some indexes put a large sheet of blue across the body, and the most prized of these are nicknamed blue gems. The amount of blue, where it sits, and how much gold or purple surrounds it all change with the pattern, so two Case Hardened copies at the same wear can differ in value by a large margin.

Collectors track specific seed numbers for each weapon in the family, since the best pattern differs between, say, an AK-47 and a Five-SeveN. There is no official blue-gem rating in game; the rankings are community conventions. If you are shopping for one, confirm the exact pattern index and compare it against community pattern guides rather than trusting a listing's wording alone, as 'gem' is sometimes used loosely.

Fades and Marble Fades

Fade finishes show a gradient of color across the weapon, and the pattern index controls how much of that gradient appears. Collectors describe this as a fade percentage, where a higher percentage means a fuller, more complete spread of color. A 100% Fade is the most saturated version and usually commands a premium over a partial fade.

Marble Fade works similarly but with a swirl of colors, and specific seeds are nicknamed for how the colors land, such as the 'Fire and Ice' arrangement on knives. As with blue gems, these names are community conventions rather than in-game labels. The practical takeaway is the same: for Fade and Marble Fade finishes, the pattern index can matter as much as the wear tier, so check it before assuming two copies are equal in value.

Other Pattern-Driven Finishes

Several other finishes reward seed hunting. Doppler and Gamma Doppler knives come in phases such as Phase 1 to 4, Ruby, Sapphire and Black Pearl, each tied to pattern ranges, and the rarer phases cost far more. Crimson Web values the placement of its web, with a centered full web being most desirable. Finishes like Slaughter and some scratch-based skins also have preferred layouts.

For most other skins in the game, though, the pattern index is irrelevant and every copy of a given wear looks the same. Chasing a seed only makes sense on the finishes where the community has established that it matters. When in doubt, a quick search for the specific skin's pattern guide will tell you whether seed hunting is worthwhile or simply a waste of a premium.

How to Find a Pattern's Index

To find a copy's pattern index, use the in-game inspect link or a third-party inspector, which reads both the float and the seed. Many marketplaces display the pattern number directly on the listing, and some let you filter or search by it. Community pattern guides then map that number to any nickname or tier.

Treat seed premiums with care. Because the rankings are community-driven, prices for top patterns can be thin and volatile, and liquidity is lower than for ordinary copies. If you are buying for looks rather than collecting, an average pattern at a good price is often the smarter pick. For related condition details, see our guide on float and wear, and for valuation help read how to price-check a skin.

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